Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 6.0 UREPAIR AND DIAGNOSISGENERAL INFORMATIONOEM GENERAL INFORMATIONVIBRATION - DRIVETRAINDIAGNOSTIC STARTING POINTCOMPONENT ROTATIONAL SPEED CALCULATIONCOMPONENT ROTATIONAL SPEED WORKSHEET
2003 Chevrolet Chevy Express G2500, Van Cargo Extended, 6.0 U
Component Rotational Speed Worksheet
2003 Chevrolet Chevy Express G2500, Van Cargo Extended, 6.0 USECTION Component Rotational Speed Worksheet
- Utilize the following worksheet as an aid in calculating the first, second and third order of tire/wheel assembly rotational speed and the first order of driveline (transmission output shaft/rear axle pinion gear) rotational speed related disturbances that may be present in the vehicle. See Fig 1 .
- If after completing the Tire/Wheel Rotation Worksheet, the frequencies calculated DO NOT match the dominant frequency of the disturbance recorded during testing, either recheck the data, or attempt to rematch the figures allowing for 1-5 MPH of speedometer error.
- If the possible tire/wheel assembly and/or driveline/transmission output shaft/rear axle pinion gear rotational speed related frequencies still DO NOT match the dominant frequency of the disturbance, the disturbance is most likely torque/load sensitive.
- If after completing the Tire/Wheel Rotation Worksheet, one of the frequencies calculated does match the dominant frequency of the disturbance, the disturbance is related to the rotation of that component group, tire/wheel assembly or driveline/transmission output shaft/rear axle pinion gear.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.